Radio Tasmanian amateur W.A. Smith using Wecovalves
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Page 706 “RADIO” November 25, 1925.
“Bonnie Black Bess,” who evidently car- Phenolic Materials 1.4 x 10% to Phenolic Materials: In air, .28%
ried Dick Turpin somewhere and then 2.2 x 106, to .499; in water, 1.429 to
died—(Bess, not Dick). Then a boy (4) Radion has the lowest absorption of 7.81%.
who, according to his mamma has been moisture. In air, .005°/° to .02% (5) Radion has the lowest power factor
told by hundreds to “try the wireless.” in water, .08% to .119. loss: .875% to 1.05‘3/0.
His turn would indeed “try” listeners
in. o
One impression that remained is that
of a girl who stood up and sang, a
little nervously, of “Love’s Garden of
Roses.” In her one could visualise how STANDARD
she’d dreamed and lain awake at nights,
150 American stations logged
for weeks, hearing her name in the
lips of all Australia—a real radio_star. _
As the last note dies, she gazes trem-
ulously at the window, to the musical
director, and by her look, her dreams
seem broken, beyond repair. by Tasmanian amateur using
But no one who has attended a trial
at 3LO, ‘Melbourne, can complain of
unfair treatment. It surpasses me how | Wecovalves
the musical director never seems to be
exhausted. He said to me as I de-
parted, “There is always the glamour EXTRACT from a letter dated April 21, 1925,
of the unexpected.” Glamour or no sent to Western Electric Coy. Ltd., London, by
glamour, I think I'd just be an ordin- Mr. W. A. Smith, 37 Cascade Road, Hobart.
ary citizen and listen-in to those who
*I am writing to you for the purpose of bringing before your notice
have passed successfully at 3LO Mel- some very interesting experiences I have had with a couple of your
bourne. Wecovalves (white spots).
e I purchased these two little valves about six months ago to build a port-
able low loss receiver. This consisted of detector and one-:t%audio
frequency amplification, and I received all Australian and New Zealaad
TESTS WHICH PROVE RADION IS experimenters working below 100 metres at loud speaker strength on a
THE SUPREME INSULATION. amall loud speaker. ~ Also, with phones, about 150 American Amateur
Stations have been logged (between 70 and 90 metres).
American Broadcasting Station K.D.K.A. 63 metres quite a fair strength
on small speaker. This set has been worked under all conditions. On the
Radion excells in the five most im- top of Mt. Wellington, 1466 ft. above sea level, these valves gave us some
very fine results, Australian and American stations being received again,
portant characteristics required of an in-
three pairs of phones being used. While on the mountain a heavy fog
sulating material—low angle phase dif- or mist came over and not having any cover for ourselves or the set. we
ference, low dielectric constant, high re- decided to continue experiments and note the effe@ moisture had on
sistivity, lowest absorption of moisture signal strength, the set, etc. Well, signal strength dropped considerably,
but the valves oscillated freely while the induction coiE were quite wet.
and lowest power factor loss. I think, sir, this is quite a severe test and speaks highly for the Weco.
As a result of exhaustive tests made Another test is that of robustness and after trying hard I am satisfied
upon specimens of Radion and twelve that these little tubes are very nigh unbreakable. On one occasion I placed
other standard materials offered as in- them in my coat pocket and a little later forgetting they were in my coat
took the coat out and shook itwell. Remembering valves were in the pocket
sulation in the radio industry in I at once tested them and found them to be quite undamaged.
America conducted by the New York On another occasion a friend of mine was helping me test some trans-
Electrical Testing Laboratories in co- REDUCED mutting circuits and chokes and in rushing along the test bench to reack
operation with the United States Bu- the ammeter knocked the set containing these doomed valves on to the
PRICE floor, a drop of 3 ft. 6ins. Well a few remarks passed between us and
reau of Sfiandards, proved Radion to be
WECOVALVES my friend offered to stand the expense. *Anyway,’ I said ‘we'll test
the best material for radio use made. are now available them in case one is alright.” ‘ Not worth your while,” replied my friend
from regular radie However, I tested them and found them both to ge O.K. to my
No other radio material in the world dealers, at
great surprise, and I think this wonderful for valves and it speaks well
can show anyway near the tests as 17/6 or the makers.”
shown below:
(1) Radion has the lowest angle phase
difference .. .. .. .. .. 0.5 to 0.6
Westernn Electric Comparnty
Phenolic Materials .. 2.0 to 3.7
(Australia)l.d
192-4 Castlereagh Street, SYDNEY. Phone: City 336 and 356.
(2) Radion has the lowest dielectric con- Phone: Cent.
8336and8949,
stant .. .. .. .. .. .. .. .. 39 And 588 Bourke St, MELBOURNE.
Phenolic Materials .. 5.8 to 7.4
(3) Radion has the highest resistivity
(megohms-em) .. .. .. 1.0 x 108